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Is your house in a high-risk natural disaster area?

Natural disasters have hit homeowners in parts of New Zealand hard over recent years, but there are ways to find out if your property is in a high risk area for natural disasters.
, Is your house in a high-risk natural disaster area?, Climate Valuation

By Miriam Bell

Posted Sunday 14 Feb 2021 on

Natural disasters have hit homeowners in parts of New Zealand hard over recent years, but there are ways to find out if your property is in a high risk area for natural disasters – and to start planning.

Devastating earthquakes in Christchurch and Kaikoura, major floods around the country including in Southland and Napier last year, the 2019 Nelson bushfires which were New Zealand’s largest in 70 years… these are just natural disasters of the last 10 years.

But, thanks to the compounding effects of climate change, the incidence of such disasters and other problematic events, like coastal erosion, is expected to increase over the coming years.

For homeowners, or buyers, that’s a big issue. If you have, or are keen on, a house in an area considered high-risk for a particular type of natural disaster it will, eventually, hit you in the pocket.

New Zealand insurers, notably the Tower Insurance and IAG group of companies which include the State, NZI, AMI and Lumley brands, have already moved into risk-based pricing for property insurance in areas considered prone to natural disasters.

This has resulted in some substantial premium increases for customers considered at increased risk of natural disaster loss due to the location or type of their property.

The situation is forecast to get worse, though. In December, the Deep South National Science Challenge report revealed New Zealand’s sea level is expected to rise by at least 10cm over the next 20 years.

That is expected to leave at least 10,000 homes in the country’s biggest cities effectively uninsurable by 2050. However, more expensive premiums and policy exclusions could start to be seen as soon as a decade from now.

This means that as time goes on and the risks amplify, it is critical for homeowners to be aware of the natural disaster risks that might be prevalent in areas they are interested in – and what that could mean for them in the future.

, Is your house in a high-risk natural disaster area?, Climate Valuation
The Kiwi love affair with coastal property seems to obscure the risks of risking sea levels and coastal erosion. Photo sourced from

Insurance Council of NZ chief executive Tim Grafton says he would be surprised if most New Zealanders living in high-risk earthquake zones, like Wellington, were unaware of the risks.

But many people seem less cognisant of other risk areas. The ongoing Kiwi love affair with coastal property, despite rising sea levels, is evidence of that.

“I would hope that the appeal of such properties would diminish, but people continue to invest in properties which are near the beach. Traditionally, they have attracted higher values. Yet the closer you are to the beach, the more you will be affected by sea level rise so the greater the risk.”

It’s not just coastal properties that are at risk from the effects of climate change. Flooding is already New Zealand’s most frequent, and costliest, natural hazard.

But rising sea levels affect the water table in areas that are close to high tide, Grafton says. That means that in low-lying areas, even if not on the beach, there is nowhere for the stormwater to go and they will end up flooding more.

“This is a global phenomenon and it impacts on insurance cover which is there for sudden and unexpected events. Currently, insurance covers events like flooding, but if floods continue to hit the area on a frequent basis, it’s no longer a risk it’s a certainty.”

It’s at that point insurance will be affected. Eventually, banks will start to raise questions over the viability of 30-year mortgages on properties in areas affected by rising sea levels, particularly coastal properties, he says.

“This might reduce the chance of getting a mortgage and, in turn, this will affect demand for those properties and the prices of those properties. Resale value will be impacted by this and people who own such properties need to think about how they are placed for the long-term.”

So how can homeowners, or home buyers, go about finding out if their property, or one they are interested in, is in a high risk natural disaster area?

There’s a range of ways to find out. First up, they should read the Land Information Memorandum (LIM) report for the property. A LIM report has to outline the known hazards, like floods, that the property might face. Checking Google Maps to establish your property’s proximity to potential hazards like waterways is useful.

If a property is up for sale, the vendor and their real estate agent have an obligation to disclose what they know about the property, which should include any known risks.

Most councils should have relevant information on hazards and risks available for property owners to look up and see what their property might face. The Commissioner for the Environment reports on, and has maps of, low-lying areas and rising sea levels. Organisations like NIWA and EQC can also provide information to help.

Getting a property inspector or structural engineer to assess and identify any issues is another option. These days there are also some companies which offer climate risk assessment services.

Karl Mallon is chief executive of Climate Valuation, which is one such company. Originating in Australia, it builds risk engines to quantify the impacts of climate change and it now has risk assessment data on every residential address in New Zealand.

Mallon says homeowners should have access to climate science which can enable them to make informed decisions. They need to know how natural hazards and climate change could impact on the cost of their insurance and the value of their property, for example.

, Is your house in a high-risk natural disaster area?, Climate Valuation
Homeowners should have access to climate science to enable them to make informed decisions, Climate Valuation’s Karl Mallon says.

“We can provide such information, along with information on the level of risk and the time frames around any risk, as well as on how resilient a property is. Additionally, we can give information on what you could do to try and better protect your house – such as, if you are in a flood zone buy flood-proof materials and run your electricals through the ceiling, not the floor. But we’re not going to say a place is ok when it’s not.”

Demand for their service is rising as the commercial world and homeowners, particularly millennials, become more aware of, and concerned with, climate change. It’s all about helping people make decisions which will give them a safer future, Mallon says.

“There are ways to mitigate many natural disaster risks. It’s a matter of cultivating an increased awareness of the building standards required for homes in high-risk areas and taking extra precautions.”

However, in some situations the range of possible solutions is limited. Those situations are usually ones which involve rising sea levels and coastal erosion.

“In those areas there’s not much that can be done and properties in those areas will see a decline in values,” he says. “A broader, more strategic approach involving government will need to be taken with them in order to allow homeowners in such areas to eventually relocate and rebuild.”

Mallon says that with looming disasters, such as those facing coastal properties, a plan needs to be made and articulated in a way that gets community buy-in and engagement.

“People won’t be able to live in the same place but they will get different land or, perhaps, money from a fund established for the purpose. There are ways out of situations as long as we act early and don’t stick our heads in the sand.”

Climate Valuation is here to help!

Climate Valuation is a passionate advocate for the rights of homeowners and homebuyers to protect themselves and their investments against the threat of climate change. We are the first company in the world to calculate the physical and financial costs of climate change to residential property. By giving homeowners and homebuyers access to this information, we aim to empower individuals to make more informed decisions and build a more climate-resilient community.

Find out if your dream home is at risk from climate change using our free site check today!

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